Plant Pathologists at Land Grant Universities conduct fungicide efficacy trials on cucurbits to determine spray programs to recommend. Results of these trials are published in Plant Disease Management Reports.
Epidemic Updates for September 18 to October 2, 2023
Virus, whitefly, Gummy Stem Blight, Pythium, Choanephora, and other pest reports from University of Florida
Question of the Week – Virus
In the South Carolina Midlands, Fall squash has produced exceptionally well, with the biggest issue being mosaic virus.
Extension Agents report on SC Cucurbits:
Mosaic virus on fall squash
Phytophthora is very active in many fall watermelon crops.
Gummy stem blight is also evident in many crops.
Fall squash have produced exceptionally well with the biggest issue being mosaic virus.
Cucumber downy mildew on cucumber was reported in Pennsylvania and Massachusetts between August 25 and September 12, 2023. CDM was reported on squash in N.C.
In September 2023, University of Arizona Cooperative Extension, Integrated Pest Management specialists published a list of pesticides and the relative efficacy index of each product on adult and nymph whiteflys.